2:00-4:00pm. Bring your family to explore the library's building sets. It's come and go constructive time in the storytime room as we bring out the library's collection of Legos®, Keva Planks®, Lincoln Logs®, blocks, Magformers® and more. No registration. Calvert Library Prince Frederick, 850 Costley Way, 410-535-0291 or 301-855-1862. CalvertLibrary.info.